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Article Dans Une Revue Journal of Physics: Conference Series Année : 2010

Magnetic domains and field-induced transitions in nanosized ErCo0.5Mn0.5O3

Résumé

In Er(Co,Mn)O3 an avalanche mechanism occurs under the application of moderate magnetic fields, leading to the rotation of the ferromagnetic domains in one or more steps, depending on the rate of variation of the applied field. In order to deeply investigate the influence of the microstructure, we have elaborated nanosized ErMn0.5Co0.5O3 compound by a citrate method, prepared at 700 °C and further calcined at increasing temperatures which assure the formation of very reactive grains of small size (~25 nm) and facilitate their full oxidation. Grains progressively grow from 20-30 nm up to several hundred nm, reaching good percolation at 950 °C (100 nm average size) for which a sudden jump is observed in the magnetization cycles M(H). We have simulated domains rotation by freezing a gel-type solution prepared from nanosized grains, orienting the individual spins on the paramagnetic state and subsequently freezing the gel to form single ferromagnetic domains.
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Dates et versions

hal-00831703 , version 1 (07-06-2013)

Identifiants

Citer

C. M. Campos, G. Pecchi, A.B. Antunes, Octavio Peña. Magnetic domains and field-induced transitions in nanosized ErCo0.5Mn0.5O3. Journal of Physics: Conference Series, 2010, 200, pp.032010(1)-032010(4). ⟨10.1088/1742-6596/200/3/032010⟩. ⟨hal-00831703⟩
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